[RE-wrenches] connector mismatch

[Steven Lawrence]

Everyone,

Just to add to this, I've seen multiple melted connectors that couldn't be
traced to anything other than mixing manufacturers.  I've seen some
connectors where you can clearly seeing arcing on the pin itself and
nowhere else.  The crimps and the housing were fine.  I've postulated it
had to do with slightly different metals expanding/contracting at different
rates.  I've made it a very hard rule at my company to never mix
manufacturers of connectors.  When we order modules, we specifically have
the PO call out the manufacturer of the connector (can't just be "MC4
compatible").  Typically we order that same brand of connectors, but
sometimes we end up getting 6" jumpers made by a harness company (there are
some connectors out there that can only work with #12 wire.  Can't use them
on #10 homeruns).  It's drastically cut down on the number of melted
connectors.  We've averaged maybe 1 or 2 on 6MW projects over a year with
this hard requirement versus 100+ we had on a 1MW rooftop project that
mixed multiple manufacturers.

Steven Lawrence
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